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runtime: simplify getargp

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Change-Id: I9ed62e8a6d8b9204c18748efd7845adabf3460b9
Reviewed-on: https://go-review.googlesource.com/28775
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2016-09-08 09:49:31 -07:00
parent 70fd814f53
commit 07bcc16547
1 changed files with 1 additions and 7 deletions
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8
src/runtime/panic.go
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@ -504,15 +504,9 @@ func gopanic(e interface{}) {
// getargp returns the location where the caller // getargp returns the location where the caller
// writes outgoing function call arguments. // writes outgoing function call arguments.
//go:nosplit //go:nosplit
//go:noinline
func getargp(x int) uintptr { func getargp(x int) uintptr {
// x is an argument mainly so that we can return its address. // x is an argument mainly so that we can return its address.
// However, we need to make the function complex enough
// that it won't be inlined. We always pass x = 0, so this code
// does nothing other than keep the compiler from thinking
// the function is simple enough to inline.
if x > 0 {
return getcallersp(unsafe.Pointer(&x)) * 0
}
return uintptr(noescape(unsafe.Pointer(&x))) return uintptr(noescape(unsafe.Pointer(&x)))
} }